Each one has been checked and inspected to ensure it lights up. Product Description 15-Color Switchable Colorful LED Penlight Size: Heart-shaped size: Overall length: 209mm Width: 119mm Height: 108mm Thickness: 33mm Length: 25cm Glossy part: 15cm Diameter: 3cm King Blade Sheet: 14.5cm x 9cm It also comes with a strap, so you don't have to worry about dropping it, and it's convenient and easy to carry. 15-Color Change Sequence: Red ⇨ Green ⇨ Blue ⇨ Hot Pink ⇨ White ⇨ Yellow ⇨ Light Blue ⇨ Light Green ⇨ Purple ⇨ Orange ⇨ Light Pink ⇨ Violet ⇨ Lime ⇨ Turquoise Blue ⇨ Hot Orange ◆ How to Use Press the A button once to change colors in sequence. Press the B button once to return to the previous color, making it easy to choose a color. Long press either the A or B button to turn off the power. You can replace the batteries (AAA x 3) and use it repeatedly. Batteries are not included with the main unit. Notes: * Due to being a foreign product, there may be very rare minor scratches, etc. Please note that the penlight itself does not come in a box. Can be used at live concerts of Johnny's Jr., King & Prince, Sexy Zone, Kis-My-Ft2, Kanjani Eight, Johnny's WEST, King & Prince, Ensemble Stars, Hypnosis Mic, STPR (Strawberry Prince), Touken Ranbu, A3!, Aqours, i☆Ris, iris, iRis, PriPara, Hakuoki, Uta no Prince-sama, Ansta, Arashi, Mr. Osomatsu, Starry Sky, Hypnosis Mic, IDOLiSH7, Idolish7, SixTONES, Urashimasakatasen, SideM, Hey! Say! JUMP, etc.! Nogizaka46, AKB48, Riinu-kun / Jel-kun / Colon-kun / Satomi-kun / Nanamori.-kun / Ruuto-kun / Sutomemo / Riinu-kun / Koro-chan / Ruu-chan / Na-kun / Sato-chan / Jeru-kun / Strawberry- #Sports #KingBlade #Penlight #Idol #Musician #Heart * Although it is not a King Blade or Lumica Light, it can be used as a compatible product.